Summary

This chapter has shown several different types of image processing filters that can be used to generate various cartoon effects, from a plain sketch mode that looks like a pencil drawing, a paint mode that looks like a color painting, to a cartoon mode that overlays the sketch mode on top of the paint mode to appear like a cartoon. It also shows that other fun effects can be obtained, such as the evil mode, which greatly enhanced noisy edges and the alien mode, which changed the skin of a face to appear bright green.

There are many commercial smartphone apps that add similar fun effects on the user's face, such as cartoon filters and skin color changes. There are also professional tools using similar concepts, such as skin-smoothing video post-processing tools that attempt to beautify women's faces by smoothing their skin while keeping the edges and non-skin regions sharp, in order to make their faces appear younger.

This chapter shows how to port the application from a desktop to...